Transmitter for distant controlling apparatus for ordnance



R. GIRARDELLI. TRANSMITTER FOR DISTANT CONTROLLING APPARATUS FOR ORDNANCE.

APPLICATION FILED JAN. 16. 1914- Patented Man-28,1922.

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Specification of Letters Patent.

Application filed January 16, 1914. Serial No. 812,529.

(GRANTED UNDER THE PROVISIONS OF rm A01 01' MARCH 3, 1921, 41 STAT. In. 1818.)

To all whom it may concern:

Be it known that I, RIcoAnno GInAnonnm, a citizen of the Kingdom of Italy, residing at Rome, Italy, have invented certain new and useful Improvementsin a Transmitter for Distant Controlling Apparatus for Ordnance, of which the following is a spec1- fication.

The subject matter of this invention is a sighting and transmitting instrument for laying a gun from a distance whlch is provided with an arangement for automatically allowing for the difference in the positions of transmitter and gun.

The invention will be described with reference to the accompanying drawings, wherein is shown an apparatus which enables the direction to be imparted to the gun directly from an observing station remote from the gun platform by the adjustment of a sightlng telescope upon the target by means of a mechanical triangle in such a manner that the difference of the positions of transmitter and n is allowed for.

Fig. 1 is a plan vlew, partially in section. of the subject matter of the invention.

Fig. 2 is a vertical section on the irregular line 2-2 of Fig. 1, looking in the di-. rection of the arrow as.

Fig. 3 is a vertical section on the line 3-3 of Fig. '1 looking from the left, and

Figure 4 is a diagram showing the position of the gun, observing station and target with the mechanical triangle superimposed.

The si hting telescope A is attached to a cam pfiite lying upon the frame B and having a recess a running radially in the direction of the sightin line. In the recess a works a block C, w ich is carried on and rotates on a pin 0 on the frame B. This block C carries a. spiral pinion D, which gears into a series of teeth a on the cam plate A aranged on one of the longitudinal sides of the recess a By rotating the spiral pinion D, the eccentricity of the cam plate A (that is to sa the distance of its central axis projected through the point 1 in Fig. 1, from the axis of the pin 0 rojected through the point 2,) can thereore be varied as may be desired. The amount of eccentricity to be imparted is determined by'a scale a. inscribed along the ed e of the recess (1 and a reading 0E mark 0 inscribed on the block 0.

The cam plate A is surrounded by a cam r ng E, which is provided with a projectlon e which has a frame-like openl e Thls openin e the central longitu inal plane of whlch passes through the central axis of the cam plate A, is bounded on both its longitudinal sides by sliding surfaces e, by which the projection e is guided on a block F, pivotally mounted on a pin f on the frame B. The point through which the axis of the pin f is projected is denoted by 3 in Fig. 1.

On the cam ring E is mounted a worm G, which gears into a series of teeth a on the cam plate A The worm shaft is provided on one end with a milled head 9 and carries on its otherend a spur wheel 9 which gears into a spur wheel 72, onthe rotar switch shaft H of the transmitter H, whic 1- is mounted on the cam ring E and serves for the electrical transmission from a distance, of the angular movement of the rotary switch shaft. I

The transmitter H may be constructed in any desired known manner. For example it may be of the construction described in the s ecification of my copending application erial No. 583,642, filed Sept. 24, 1910 which is the same as British Letters Patent No. 22714/10 and be connected by a three phase conductor J to the electro-motor which serves to drive the directing mechanism of the corresponding gun.

The frame B, he cam plate A with the block C, and the cam ring E with the projection e form a mechanical triangle 1, 2, 3 (see Fig. 1), to which any desired form Patented Mar. as, 192% can be given by the rotation of the worm G a and an alteration of the eccentricity 1, 2 produced by rotating the spiral inion D, With the instrument properly a justed it will then be possible in the manner described to give the mechanical triangle 1, 2, 3 such a form that it is similar to the triangle 1', 2', 3' shown in Fig. 4, and determined by the gun platform 1', the observing station 2' and the target 3'. The eccentricity 1, 2 in this mechanical triangle then possesses a value which is inversely proportional to the distance 3', 2' of the target from the observing station and the scale a must consequentl be so arran ed and numbered, that each division thereo corres onds' to a definite distance of the target from the observing station 2.

In order to make the mechanical trian 1e 1, 2, 3 when using the instrument (see 1) similar to the triangle 1, 2', 3' (see hlg. 4), it is therefore only necessary to ad ust, by rotating the spiral pinion D, the eccentricity 21 to a valve such that 2'1:2-3 2'1:2:3' and to rotate the worm G to bring the side 21 into coincidence with the line 2'-3 (see Fig. 4).

The frame B is so set up at the observing station 2' (see Fig. 4), thatpoints 2 and 2 coincide and the side 2, 3 of the triangle falls in the direction of the line, observmg station-gun (2, 1'). As the distance 1 and 2 between the gun and the observing station is constant in the large triangle and the side 2, 3 is constant in the mechanical triangle, it will be obvious, in order to preserve the similarity between the two triangles, when the position; of the target is changed, that the side 1, 2 opposite t e angle at 3 in the mechanical triangle will have to be changed as to its length, that is, it will have to be increased or decreased in exact pro ortion with, but inversely to the range. upposing for instance, that the target has traveled towards the observing station 2, to the point 3 along the line 3, 2', or in other words, that the range has decreased then the angle 1', 3, 2 has increased, and is now represented by 1', 3", 2'. If now the distance 21 be made of such value that 21:23:: 21:2-3 and the line 2-1" brought into coincidence by the operation of worm G, with line 2'3, then the mechanical triangle 23l will be similar to the triangle 2'-3--1' since the an les 1-2-3 and 1' 2'-3* are equal an 2-1:23::2 1': 2-3 Since angles 3'-1-2:3-1-2 and 3 1' -2"= 3 1' 2, then (3'-1' 2') (3 -1' 2') (3-1 -2) (a-1 2). Hence th angle through which the un must move to train on the target is equa to the angle through which the circular cam has to be turned. To adjust the gun the spiral pinion D is first rotated until the mark 0 is opposite that division on the scale a which corresponds to th distance of the target (3') from the observing station (2), and which may be determined by means of a range finder for eriample.

If now the sighting telescope A be adjusted upon the target by rotating the worm G, the angle 1, 2, 3 of the mechanical triangle 1, 2, 3 will be equal to the angle 1', 2, 3 in the triangle 1', 2', 3', and furthermore, as now both triangles are similar, the angle 3, 1, 2'will be equal to the angle 3', 1', 2.

In other words the range is first set oif on the scale a by turning the spiral pinion D. This will bring the point 1 nearer to or further away from the fixed point 2., Thereupon the line 1-2 is directed against the target by turning the worm G. This will the other fixed point 3, and simultaneously change the direction of the gun.

Since the angles of rotation of the worm .ir and consequently also of the switch shaft H of the transmitter H, positively connected thereto by the spur wheel garing 9 h are proportionally ual t0 the variations of the angle 3, 1, 2, it 1sobviously possible at once to so construct the device that the lateral angles of rotation ofthe gun, which are proportionally equal to the angles of rotation of the switch shaft H of the transmitter, shall be always equal to the variations of the angle 3, 1, 2, under the supposition that the eccentric, that is, side 1-2 has already been set to correspond with the ran e.

If therefore the gun has been once so adjusted that its direction forms with the line, gun-observing station (1, 2) the same angle as the'side 3, 1 of the triangle does with the side 1, 2 of the triangle, the equality of these two angles remains permanently retained for a single range.

Now since owing to the above mentioned adjustments of the spiral pinion D and of the worm G the angle 3, 1, 2 is equal to the angle 3', 1', 2, the angle which the direction of the gun forms with the line 1', 2, must also be equal to the angle 3', 1, 2, that is to say the gun is directed laterally upon the tar et. It is merely necessary therefore, after t e apparatus has been adjusted by means of the spiral pinion D to the range,

that is, the distance between the observing station and the target, to direct the sighting telescope A against the target by turnin it by means of the worm and hand wheel 9' in order to impart to the gun a lateral direction allowing for the difi'erence of the instrument and the gun, correctly.

I claim:

1. Sighting and transmitting instrument for laying a gun from a distance automatically, said gun being situated at a known and invariable distance from said instrument and determined to be directed upon a target situated at a known, but variable, distance from said instrument; said instrument having three mechanically connected points forming a triangle adjustable to any desirable form; two of said three points being fixed and confining a side of invariable length, and one of the other sides of said triangle having a length adjustable to the actual distance between the instrument and the target; and the angle lying opposite to said side of invariable length in said triangle being adju'sted to correspond to another angle lying between two lines imagined to be drawn from the gun to the instrument and the target respectively, by adjusting the said adjustable side of the triangle to its proper corelative length and positioning in line again alter the position of point 1 relative with the said target; said instrument comprising a frame, a sighting device, a transmitter for electricall transmitting angular movements, means for adjusting said triangle side and angle; and mechanical connection between said angle adjustin means on said sighting device and transmltter respectively.

2. Sighting and transmitting instrument for laying a gun from a distance automatically, comprising a frame; a sight carrier in the shape of a circular cam and provided with a radial slot; at 'ournal in said frame provided with a hea engaging said slot; means for displacing said carrier relatively to said head; a sleeve engaging the cam surface of said .carrier; a radial arm on said RIOCARDO GIRARD'ELLI.

Witnesses Domnmoo CAT'rno, PABQUELE PIRRO. 

